One such accident happened April 21 on Interstate 17, according to azcentral.com.

The news website reported that the crash occurred when an 18-year-old Phoenix woman drove into the median on the highway and her car collided with another vehicle on the southbound side. She and her passenger, a 19-year-old Scottsdale woman, were thrown from the car and killed, the site added.

Three passengers who were in the car with the young women were later treated for injuries at a hospital, Naztoday.com noted.

This wasn't the only deadly accident on an Arizona highway in April. On April 18, there was a fatal head-on collision on State Route 69 in Prescott Valley, Ariz, azentral.com reported.

A 39-year-old man drove a Ford F-350 pickup truck into oncoming traffic and collided with a Chevy Impala, the news site wrote, adding that the 69-year-old man in the Impala was killed as a result of the collision.

The man driving the truck was flown to a Phoenix hospital and is listed in serious condition, Kaff News said in an article about the crash.

Statistics from the Arizona Department of Transportation show that 12.87% of the motor vehicle crashes in Arizona in 2013 resulted in fatalities.